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A156150 Primes p such that p+2 = 0 (mod pi(p)) and pi(p)=A000720(p) is prime. 1

%I #3 Jul 14 2012 11:32:23

%S 31,353,9559783,9559903

%N Primes p such that p+2 = 0 (mod pi(p)) and pi(p)=A000720(p) is prime.

%C A subsequence of A156151.

%F a(n) = A000040(A156149(n))

%o (PARI) p=c=0; until(0, until( isprime(c++), p=nextprime(p+1)); (p+2)%c & next; print1( p","))

%Y Cf. A156153.

%K hard,more,nonn

%O 1,1

%A _M. F. Hasler_, Feb 04 2009

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Last modified April 24 00:30 EDT 2024. Contains 371917 sequences. (Running on oeis4.)